Preparation method and application method of composite anticorrosive coating for stay cable of cable-stayed bridge

Abstract

The invention discloses a preparation method and an application method of a composite anticorrosive coating for a stay cable of a cable-stayed bridge. According to the invention, a graphene epoxy resin anticorrosive coating is prepared by dispersing graphene in an ammonia water solvent by adopting an X-ray laser dispersion method so as to prepare a graphene dispersion liquid, adding an anti-precipitating agent, and subjecting a formed mixture and waterborne epoxy resin to magnetic stirring and mixing, wherein the graphene dispersed in the coating is used as an anti-corrosion barrier so as to improve the corrosion resistance of the composite coating. The composite anticorrosive coating can endow traditional epoxy anticorrosive coatings with a part of special functions, including ultraviolet resistance, wear resistance, antibacterial property and the like, which are not possessed by the traditional epoxy anticorrosive coatings. Meanwhile, the X-ray laser dispersion method is adopted, so the graphene can be dispersed more effectively, and the corrosion resistance of the coating is greatly improved; and the coating can be used in combination with fluorocarbon finish paint or polyurethane finish paint in an epoxy coating system, color changing is conducted on a primer paint film through the finish paint so as to adjust the film forming color of the coating, and therefore, the corrosion resistance and the attractive appearance of the stay cable of the cable-stayed bridge are greatly improved.

Description

technical field [0001] The invention belongs to the technical field of bridge safety, and in particular relates to the preparation and application method of a composite anticorrosion paint used for cables of cable-stayed bridges. Background technique [0002] Corrosion of the steel wire of the cable due to the increase in the molecular weight will cause the HDPE sheath to bulge at the corrosion site. Therefore, anti-corrosion coatings are used for the corrosion of many cables. Based on the unique structure of graphene, it has excellent physical and chemical anti-corrosion effects. At present, a lot of progress has been made in the research results of anti-corrosion films prepared by CVD, but there are many factors affecting the quality of films, including the selection requirements of metal substrates, substrate pretreatment, carbon source types, high-temperature vacuum environment, etc., which inevitably lead to the occurrence of graphene defects. residues, accelerate elec...

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Problems solved by technology

However, a large amount of organic solvents are used in the preparation process of in situ synthesis, which is harmful to human body and environment.

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